<?php
session_cache_expire( 20 );
session_start();
$inactive = 1200;
if(isset($_SESSION['start']) ) {
	$session_life = time() - $_SESSION['start'];
	if($session_life > $inactive){
		header("Location: user_logout.php");
	}
}
$_SESSION['start'] = time();

if($_SESSION['valid_user'] != true){
	header('Location: ../index.php');

}else{
	header('Location: ../login.php');
}

?>